This validator checks if password is strong enough. Password is strong enough, if it have defined minimum number of characters(which can be changed), and if it contain at least one upper case letter, at least one lower case letter, and at least one number.

Total 2 comments

I found a bug in the line 31, because when I run the yiic message messagePath shows me an error...

the wrong line is:
$message=$this->message!==null?$this->message:Yii::t("EPasswordStrength","{attribute} is weak. {attribute} must contain at least {$this->min} characters, at least one lower case letter, at least one upper case letter, and at least one number.");

and the fixed one:
$message=$this->message!==null?$this->message:Yii::t("EPasswordStrength","{attribute} is weak. {attribute} must contain at least {min} characters, at least one lower case letter, at least one upper case letter, and at least one number.", array("{min}"=>$this->min));

this is the way you should pass the params..
Yii::t('app', 'Path alias "{alias}" is redefined.',
array('{alias}'=>$alias))

according to:
http://www.yiiframework.com/doc/guide/1.1/en/topics.i18n#internationalization